4CX350A/8321 - 350 W RADIAL BEAM POWER TETRODE TUBE

The 4CX350A/8321 Tube for sale is a robust radial beam power tetrode with a maximum plate dissipation of 350 watts, making it well-suited for Class AB audio or RF amplifier applications.

While externally identical to the 4CX250B, this tube boasts enhanced internal construction and improved characteristics for superior performance. Increased amplification factor and cathode area contribute to higher transconductance and figure of merit.

Key Features:

• Maximum Plate Dissipation: 350 Watts
• Frequency for Max Rating (CW): 110 MHz
• Amplification Factor: 13
• Filament/Cathode: Oxide Coated, 6.0 Volts, 2.9 Amps
• Cooling: Forced Air
• Base: 9-Pin Special, SK-600A
• Capacitance (Grounded Cathode):
  • Input: 23.6 pF
  • Output: 5.6 pF
  • Feedthrough: 0.3 pF
• Dimensions:
  • Length: 2.47 in (62.60 mm)
  • Diameter: 1.64 in (41.60 mm)
• Weight: 4 oz (113 g)